This data is from wikipedia

Non-DASH
--------
itag value 	Default container 	Video resolution 	Video encoding 	Video profile 	Video bitrate (Mbit/s) 	Audio encoding 	Audio bitrate (kbit/s)
17 		3GP			144p			MPEG-4 Visual 	Simple 		0.05			AAC 		24
36 					240p		 					0.175 					32
18 		MP4 			360p 			H.264	 	Baseline 	0.5 					96
22	 				720p				 	High 		2-3 					192
43 		WebM			360p 			VP8 		N/A 		0.5-0.75	 	Vorbis	 	128

DASH
----
itag value 	Default container 	Video resolution 	Video encoding 	Video profile 	Video bitrate (Mbit/s)
160 		MP4 			144p 15-30 fps 		H.264 		Main 		0.1%G–%@0.12
133 					240p 							0.2%G–%@0.3
134 					360p 							0.5%G–%@0.7
135 					480p 							0.9%G–%@1.2
136 					720p 							1.8%G–%@2.4
298 					720p HFR 						3%G–%@3.5
137 					1080p 					High		2.5%G–%@3
299 					1080p HFR 						5%G–%@6
264 					1440p 							4%G–%@4.5
266 					2160p 							12.5%G–%@16
138 					4320p 							13.5%G–%@25
278 		WebM 			144p 15-30 fps 		VP9 		Profile 0 	0.1%G–%@0.13
242 					240p 							0.2%G–%@0.3
243 					360p 							0.4%G–%@0.6
244 					480p 							0.7%G–%@1
247 					720p 							1.5%G–%@2
248 					1080p 							2.5%G–%@3
271 					1440p 							9
313 					2160p 							13%G–%@15
272 					4320p 							20%G–%@25
302 					720p HFR 						2.5%G–%@3
303 					1080p HFR 						4%G–%@5
308 					1440p HFR 						10
315 					2160p HFR 						20%G–%@25
330 					144p HDR, HFR 				Profile 2 	0.08
331 					240p HDR, HFR 						0.1%G–%@0.15
332 					360p HDR, HFR 						0.25
333 					480p HDR, HFR 						0.5
334 					720p HDR, HFR 						1
335 					1080p HDR, HFR 						1.5%G–%@2
336 					1440p HDR, HFR 						5%G–%@7
337 					2160p HDR, HFR 						12%G–%@14


DASH (Audio only)
-----------------
itag value 	Default container 	Audio encoding 	Audio bitrate (kbit/s)
139 		M4A		 	AAC	 	48
140 							128
171 		WebM		 	Vorbis
249 					Opus	 	48
250 							64
251 							160
